Bichromatic UV detection system for atomically-resolved imaging of ions

Abstract

We present a compact and bichromatic imaging system, located outside of the vacuum chamber of a trapped ion apparatus, that collects the fluorescence of 230.6 nm and 369.5 nm photons simultaneously on a shared EMCCD camera. The system contains two lens doublets, consisting of a sphere and an asphere. It provides a numerical aperture of 0.45 and 0.40 at 230.6 nm and 369.5 nm, respectively, and enables spatially resolved state detection with a large field of view of 300 $\mu$m for long ${}^{115}$In${}^{+}$/${}^{172}$Yb${}^{+}$ Coulomb crystals. Instead of diffraction limited imaging for one wavelength, the focus in this system is on simultaneous single-ion resolved imaging of both species over a large field with special attention to the deep UV wavelength (230.6 nm) and the low scattering rate of In${}^{+}$ ions. The introduced concept is applicable to other dual-species applications.

References in corpus (23)

• Demonstration of the trapped-ion quantum-CCD computer architecture
• Quantum gate teleportation between separated qubits in a trapped-ion processor
• Repeated multi-qubit readout and feedback with a mixed-species trapped-ion register
• A single ion coupled to an optical fiber cavity
• Enhanced Quantum Interface with Collective Ion-Cavity Coupling
• High Speed, High Fidelity Detection of an Atomic Hyperfine Qubit
• Multi-Species Trapped Ion Node for Quantum Networking
• Linear Paul trap design for an optical clock with Coulomb crystals
• A high-precision rf trap with minimized micromotion for an In+ multiple-ion clock
• An objective lens for efficient fluorescence detection of single atoms
• Controlling systematic frequency uncertainties at the $10^{-19}$ level in linear Coulomb crystals
• Photon collection from a trapped ion--cavity system
• Benchmarking a high-fidelity mixed-species entangling gate
• Dual-Species, Multi-Qubit Logic Primitives for Ca+/Sr+ Trapped-Ion Crystals
• High resolution adaptive imaging of a single atom
• Cavity-induced back-action in Purcell-enhanced photoemission of a single ion in an ultraviolet fiber-cavity
• Ultra-low vibration closed-cycle cryogenic surface-electrode ion trap apparatus
• QED with a spherical mirror
• Trapped Ion Imaging with a High Numerical Aperture Spherical Mirror
• Frequency measurement of the clock transition of an indium ion sympathetically-cooled in a linear trap
• Efficient fluorescence collection and ion imaging with the "tack" ion trap
• Single Ion Imaging and Fluorescence Collection with a Parabolic Mirror Trap
• Design of a novel monolithic parabolic-mirror ion-trap to precisely align the RF null point with the optical focus

Cited by in corpus (2)

• ${}^{115}$In${}^{+}$-${}^{172}$Yb${}^{+}$ Coulomb crystal clock with $2.5\times 10^{-18}$ systematic uncertainty
• Cold highly charged ions in a radio-frequency trap with superconducting magnetic shielding